Juan Castro, known professionally as Tonny Tún Tún, and born on March 4, 1977, in Carolina, Puerto Rico, is a singer-songwriter and record producer. He began his musical journey at the Escuela Libre de Música and played in a philharmonic orchestra. His career took off when he joined groups such as Víctor Roque y La Gran Manzana and Grupomanía. In 1999, Tonny Tún Tún released his debut album Caminando under Cayman Records, featuring hits like "Fiebre" and "Solo te digo". Subsequent albums included Con la música por dentro (2001), Afrodisíaco (2004), and Merengue en blanco y negro (2006).